Re: Drywall over plaster walls
No liquid nails necessary, just use screws long enough to reach through the drywall, through the plaster and lath and into the framing of the wall. I would recommend locating a stud in each wall, then measure 16" on center in each direction so that your fasteners are anchoring into the framing and not just the lath.
It's a bit messier, but you can probably bet that there is no insulation in the walls, so this would be a good time to strip at least the exterior wall and adding insulation OR boring holes and adding blown to the cavities. Just a thought.
You'll also need to add plaster rings to all wall outlets and switches to bring the device flush with the surface of the new wall.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!